# FX_InvSqrt

## C Specification

      #include <nitro/fx/fx_cp.h>

      fx32 FX_InvSqrt(fx32 x);

## Description

This function calculates the reciprocal of an `fx32` format square root and returns the result in the `fx32` format. The Divider and Square Root Calculator are used internally.

## Arguments

`x` | `fx32` format fixed-point decimal

## Return Values

Reciprocal of the square root of `x`.

## See Also

FX_Sqrt, FX_Inv

## Revision History

10/19/2004 Minor correction to Description.
01/19/2004 Initial version.